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. 2007 Oct 26;190(1):179–192. doi: 10.1128/JB.01052-07

TABLE 2.

Effects of recJ, xseA, sbcCD, Δxon, sbcB15, and xonA2 mutations on the UV survival and genetic recombination of recBCD+ strainsa

Strain Relevant genotype
Relative survival at 72 J m−2b (n) Relative frequencyc
recJ xseA sbcCD xon leu+ transduction (A) (n) pro+ exconjugants (B) (n) Ratio (B/A)
AB1157 + + + + 1 (3) 1 (13) 1 (19)
BT122 recJ + + + 0.18 ± 0.12 (3) 0.88 ± 0.11 (3) 0.65 ± 0.08 (3) 0.74
BT430 + xseA + + 1.48 ± 0.43 (2) 1.14 ± 0.05 (3) 1.04 ± 0.13 (3) 0.91
BT384 + + sbcCD + 0.95 ± 0.05 (2) 1.01 ± 0.12 (3) 1.13 ± 0.26 (4) 1.12
WA818 + + + xonA2 1.25 ± 0.33 (2) 0.90 ± 0.14 (3) 0.26 ± 0.02 (4) 0.28
BT420 + + + sbcB15 3.75 ± 1.24 (2) 1.21 ± 0.02 (3) 1.16 ± 0.20 (3) 0.95
BT449 + + + Δxon 1.55 ± 0.10 (2) 0.71 ± 0.09 (3) 0.19 ± 0.04 (3) 0.26
BT386 recJ + sbcCD + 0.33 ± 0 (2) 0.70 ± 0.09 (4) 0.92 ± 0.08 (3) 1.31
BT432 + xseA sbcCD + 1.25 ± 0.25 (2) 1.22 ± 0.38 (3) 1.03 ± 0.19 (3) 0.84
BT436 recJ xseA + + 0.0035 ± 0.0003 (2) 0.95 ± 0.09 (3) 0.88 ± 0.14 (3) 0.93
BT538 recJ + + xonA2 0.28 ± 0.08 (4) 0.49 ± 0.14 (5) 0.143 ± 0.015 (3) 0.29
BT445 recJ + + sbcB15 0.10 ± 0.07 (2) 0.86 ± 0.11 (3) 0.33 ± 0.08 (3) 0.38
BT477 recJ + + Δxon 0.17 ± 0.14 (3) 0.31 ± 0.12 (3) 0.066 ± 0.006 (3) 0.21
BT534 + xseA + xonA2 1.25 ± 0.50 (2) 0.97 ± 0.20 (4) 0.42 ± 0.04 (3) 0.43
BT434 + xseA + sbcB15 1.08 ± 0.30 (2) 1.25 ± 0.09 (3) 1.35 ± 0.42 (5) 1.08
BT450 + xseA + Δxon 1.18 ± 0.27 (2) 1.55 ± 0.13 (3) 1.78 ± 0.06 (3) 1.15
BT421 + + sbcCD xonA2 0.70 ± 0.45 (3) 0.82 ± 0.13 (4) 0.33 ± 0.06 (3) 0.40
BT444 + + sbcCD sbcB15 0.43 ± 0.03 (2) 1.3 ± 0.21 (3) 1.50 ± 0.25 (3) 1.15
BT543 + + sbcCD Δxon 0.73 ± 0.25 (2) 0.62 ± 0.02 (3) 0.34 ± 0.03 (3) 0.55
BT446 recJ xseA sbcCD + 0.0038 ± 0 (2) 0.58 ± 0.06 (3) 0.63 ± 0.16 (3) 1.02
BT536 recJ xseA + xonA2 0.0016 ± 0.0009 (5) 0.80 ± 0.3 (5) 0.31 ± 0.08 (3) 0.39
BT443 recJ xseA + sbcB15 0.00014 ± 0.00003 (3) 1.3 ± 0.23 (3) 0.75 ± 0.20 (3) 0.58
BT459 recJ xseA + Δxon 0.00025 ± 0.00018 (3) 1.03 ± 0.18 (3) 0.46 ± 0.04 (3) 0.45
BT435 + xseA sbcCD xonA2 0.16 ± 0.01 (2) 1.14 ± 0.09 (4) 0.92 ± 0.10 (3) 0.81
BT442 + xseA sbcCD sbcB15 0.0045 ± 0.0001 (2) 1.11 ± 0.11 (4) 0.90 ± 0.19 (3) 0.81
BT448 + xseA sbcCD Δxon 0.017 ± 0.006 (2) 1.15 ± 0.16 (4) 1.76 ± 0.29 (3) 1.53
BT422 recJ + sbcCD xonA2 0.13 ± 0.05 (2) 0.40 ± 0.07 (4) 0.096 ± 0.013 (3) 0.24
BT447 recJ + sbcCD sbcB15 0.023 ± 0.012 (2) 1.01 ± 0.17 (3) 0.70 ± 0.19 (3) 0.69
BT460 recJ + sbcCD Δxon 0.028 ± 0.010 (2) 0.17 ± 0.05 (4) 0.065 ± 0.007 (3) 0.38
BT431 recJ xseA sbcCD xonA2 0.0030 ± 0.0011 (3) 0.54 ± 0.21 (5) 0.39 ± 0.01 (3) 0.72
0.0011 ± 0.0001 (2) 0.61 ± 0.09 (3) 0.45 (1)d 0.73
BT498 recJ xseA sbcCD sbcB15 0.0011 ± 0.0005 (3) 0.48 ± 0.16 (3) 0.35 ± 0.02 (3)d 0.73
BT497 recJ xseA sbcCD Δxon 0.00006 ± 0.00001 (3) 0.76 ± 0.04 (3) 0.41 ± 0.02 (3)d 0.54
WA632 (recB) + + + + 0.0011 ± 0.0005 (3) 0.0041 ± 0.0023 (3) 0.0083 ± 0.0043 (4)
a

The recJ, xseA, sbcCD, and Δxon mutations are null alleles due to insertion or deletion. sbcB15 is a missense mutation, and xonA2 is an unsuppressed nonsense mutation. All strains are derivatives of AB1157. UV survival and genetic recombination were measured by transduction and conjugation, respectively.

b

Survival values are means from n independent determinations given with the deviation from the mean (when n is 2) or the standard deviation (when n is 3 to 5) and are expressed relative to the survival of strain AB1157 [(4.0 ± 3.0) × 10−2].

c

Transduction and exconjugant frequencies are means from n independent determinations with standard deviations and are expressed relative to those of strain AB1157. Strain AB1157 has a leu+ transduction frequency of (4.9 ± 1.3) × 10−5 and a pro+ exconjugant frequency of (1.1 ± 0.2) × 10−1.

d

Experiments performed at 37°C; all other experiments were performed at 30°C.